Haplogroup O-SK1691 is a Y-chromosome (paternal) haplogroup on TheYtree, catalogued with its defining mutations, sample distribution and phylogenetic tree.
| ISOGG name | O2a1b1a1a1a1i |
|---|---|
| Defining mutations | 23 |
| Downstream branches | 80 |
| Estimated age | 7,360 years |